It's funny because people think they'd just throw an NPC in there at the very start, but...
it'd be so easy to thematically add it into each area. Let's thing about them for a moment, just for a few of the 50 expert dungouns:
Wanderer's Palace: Put in an NPC Adventurer. We already saw other adventurers in there. Can add flavor text about being chased out by tonberries.
Copperbell Mines (HM): Can be one NPC that is part of the mining crew.
Haukke Manor (HM): Wood Wailer.
Halatali (HM): There's already NPC's at the start of this dungoun.
Brayflox (HM): Goblin NPC. Jinglyshines!
Hullbreaker Isle:
Stone Vigil (HM): Knights at the start.
Sastasha (HM): A number of ways. Could add a "Treacherous Pirate" (though wouldn't thematically fit with the idea of Temper) or a Sea wolf.
Sunken Temple (HM): Excavator/Researcher who complains about there being monsters. The two that had gone there left, after all. It's not impossible someone (Even one of them) would come to the entrance.
And hell, let's tackle the Lost city of Amdapor, since you somehow thought this was one that would be SO IMPOSSIBLE for anyone to do.
You could easily put a wood wailer there at the start. Matter of fact, that'd be extremely easy. Why do I say that? Because they state that their ranks are spread too thin and that this is a task that would normally be reserved for them. So it's not unreasonable for them to send a person or two to hold / watch the entrance while a group of adventurers go deeper in.
That doesn't work for ya? How about the ever-popular Moogle? Doesn't break the lore, and it's not like there's anything preventing a moogle from going there.
Simply put, you can specialize the NPC's, give them some flavor text if you want, and it builds on the world, isntead of taking away from it. But that's only if you manage to think outside a narrow margin.
Minimum ilevel already prevents this, and has prevented my friends from derping before.
This is actually a fairly-reasonable suggestion that would help out some players with their issues, and is perfectly reasonable as it does not go out of its way to dismiss the problem at hand. Thank you.
Most games get by on this with a portrait of gear represented by yellow (below a threshold) and Red (Broken) - WoW (The game this is heavily based off) is a good example of this.
This 'blessing' was added not because they wanted you to be unable to spend more than 60 minutes in a dungoun, but because it helps remove the strain from the servers. That is their biggest reason, to make sure people aren't AFK and holding up the dungoun que. It ensures that there will almost always (unless the playerbase breaches a certain capacity) be a dungoun slot available to be filled.
Sometimes people don't think to check it. Heck, I try to repair my gear whenever I can (Because I can go over 100%, and there's been times on my DRG when I've hit 10%. The reason for this? I was just doing other stuff the week. Wheather it was not logging into the game, or when I was logged in I was quickly jumping into content. These are things that happen, and players shouldn't be effectively crippled with no recourse but to eat a penalty that was added to prevent OTHER issues to fix their mistake.